1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
8 This program is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free Software
10 Foundation; either version 2 of the License, or (at your option) any later
13 This program is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 You should have received a copy of the GNU General Public License along with
19 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
20 Place - Suite 330, Boston, MA 02111-1307, USA.
22 Further information about the GNU General Public License can also be found on
23 the world wide web at http://www.gnu.org.
26 --------------------------------------------------------------------------------
28 7/31/99 TP Added RunIC function that runs the sim so that every frame
29 begins with the IC values from the given FGInitialCondition
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34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
36 #ifndef FGFDMEXEC_HEADER_H
37 #define FGFDMEXEC_HEADER_H
39 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
41 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
45 #include "FGInitialCondition.h"
46 #include "FGJSBBase.h"
47 #include "FGPropertyManager.h"
51 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
53 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
55 #define ID_FDMEXEC "$Id$"
57 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
59 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
61 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
62 COMMENTS, REFERENCES, and NOTES [use "class documentation" below for API docs]
63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
65 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
67 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
69 /** Encapsulates the JSBSim simulation executive.
72 @see <a href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jsbsim/JSBSim/FGFDMExec.h?rev=HEAD&content-type=text/vnd.viewcvs-markup">
74 @see <a href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jsbsim/JSBSim/FGFDMExec.cpp?rev=HEAD&content-type=text/vnd.viewcvs-markup">
77 @doc This class is the interface class through which all other simulation classes
78 are instantiated, initialized, and run. When integrated with FlightGear (or
79 other flight simulator) this class is typically instantiated by an interface
80 class on the simulator side.
82 When an aircraft model is loaded the config file is parsed and for each of the
83 sections of the config file (propulsion, flight control, etc.) the
84 corresponding "ReadXXX()" method is called. From within this method the
85 "Load()" method of that system is called (e.g. LoadFCS).
87 <h4>JSBSim Debugging Directives</h4>
89 This describes to any interested entity the debug level
90 requested by setting the JSBSIM_DEBUG environment variable.
91 The bitmasked value choices are as follows:<ol>
92 <li><b>unset</b>: In this case (the default) JSBSim would only print
93 out the normally expected messages, essentially echoing
94 the config files as they are read. If the environment
95 variable is not set, debug_lvl is set to 1 internally</li>
96 <li><b>0</b>: This requests JSBSim not to output any messages
98 <li><b>1</b>: This value explicity requests the normal JSBSim
100 <li><b>2</b>: This value asks for a message to be printed out when
101 a class is instantiated</li>
102 <li><b>4</b>: When this value is set, a message is displayed when a
103 FGModel object executes its Run() method</li>
104 <li><b>8</b>: When this value is set, various runtime state variables
105 are printed out periodically</li>
106 <li><b>16</b>: When set various parameters are sanity checked and
107 a message is printed out when they go out of bounds</li>
112 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
114 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
116 class FGFDMExec : public FGJSBBase
120 /// Default constructor
121 FGFDMExec(FGPropertyManager* root = 0);
123 /// Default destructor
126 /** This routine places a model into the runlist at the specified rate. The
127 "rate" is not really a clock rate. It represents how many calls to the
128 FGFDMExec::Run() method must be made before the model is executed. A
129 value of 1 means that the model will be executed for each call to the
130 exec's Run() method. A value of 5 means that the model will only be
131 executed every 5th call to the exec's Run() method.
132 @param model A pointer to the model being scheduled.
133 @param rate The rate at which to execute the model as described above.
134 @return Currently returns 0 always. */
135 int Schedule(FGModel* model, int rate);
137 /** This executes each scheduled model in succession.
138 @return true if successful, false if sim should be ended */
141 /** Initializes the sim from the initial condition object and executes
142 each scheduled model without integrating i.e. dt=0.
143 @return true if successful
148 void Freeze(void) {frozen = true;}
151 void Resume(void) {frozen = false;}
153 /** Loads an aircraft model.
154 @param AircraftPath path to the aircraft directory. For instance:
155 "aircraft". Under aircraft, then, would be directories for various
156 modeled aircraft such as C172/, x15/, etc.
157 @param EnginePath path to the directory under which engine config
158 files are kept, for instance "engine"
159 @param model the name of the aircraft model itself. This file will
160 be looked for in the directory specified in the AircraftPath variable,
161 and in turn under the directory with the same name as the model. For
162 instance: "aircraft/x15/x15.xml"
163 @return true if successful*/
164 bool LoadModel(string AircraftPath, string EnginePath, string model);
167 /** Loads an aircraft model. The paths to the aircraft and engine
168 config file directories must be set prior to calling this. See
170 @param model the name of the aircraft model itself. This file will
171 be looked for in the directory specified in the AircraftPath variable,
172 and in turn under the directory with the same name as the model. For
173 instance: "aircraft/x15/x15.xml"
174 @return true if successful*/
175 bool LoadModel(string model);
178 /** Sets the path to the engine config file directories.
179 @param EnginePath path to the directory under which engine config
180 files are kept, for instance "engine"
182 bool SetEnginePath(string path) { EnginePath = path; return true; }
184 /** Sets the path to the aircraft config file directories.
185 @param AircraftPath path to the aircraft directory. For instance:
186 "aircraft". Under aircraft, then, would be directories for various
187 modeled aircraft such as C172/, x15/, etc.
189 bool SetAircraftPath(string path) { AircraftPath = path; return true; }
191 /** Sets the path to the autopilot config file directories.
192 @param ControlPath path to the control directory. For instance:
195 bool SetControlPath(string path) { ControlPath = path; return true; }
198 /// @name Top-level executive State and Model retrieval mechanism
200 /// Returns the FGState pointer.
201 inline FGState* GetState(void) {return State;}
202 /// Returns the FGAtmosphere pointer.
203 inline FGAtmosphere* GetAtmosphere(void) {return Atmosphere;}
204 /// Returns the FGFCS pointer.
205 inline FGFCS* GetFCS(void) {return FCS;}
206 /// Returns the FGPropulsion pointer.
207 inline FGPropulsion* GetPropulsion(void) {return Propulsion;}
208 /// Returns the FGAircraft pointer.
209 inline FGMassBalance* GetMassBalance(void) {return MassBalance;}
210 /// Returns the FGAerodynamics pointer
211 inline FGAerodynamics* GetAerodynamics(void){return Aerodynamics;}
212 /// Returns the FGInertial pointer.
213 inline FGInertial* GetInertial(void) {return Inertial;}
214 /// Returns the FGGroundReactions pointer.
215 inline FGGroundReactions* GetGroundReactions(void) {return GroundReactions;}
216 /// Returns the FGAircraft pointer.
217 inline FGAircraft* GetAircraft(void) {return Aircraft;}
218 /// Returns the FGTranslation pointer.
219 inline FGTranslation* GetTranslation(void) {return Translation;}
220 /// Returns the FGRotation pointer.
221 inline FGRotation* GetRotation(void) {return Rotation;}
222 /// Returns the FGPosition pointer.
223 inline FGPosition* GetPosition(void) {return Position;}
224 /// Returns the FGAuxiliary pointer.
225 inline FGAuxiliary* GetAuxiliary(void) {return Auxiliary;}
226 /// Returns the FGOutput pointer.
227 inline FGOutput* GetOutput(void) {return Output;}
228 // Returns a pointer to the FGInitialCondition object
229 inline FGInitialCondition* GetIC(void) {return IC;}
230 // Returns a pointer to the FGTrim object
231 FGTrim* GetTrim(void);
234 /// Retrieves the engine path.
235 inline string GetEnginePath(void) {return EnginePath;}
236 /// Retrieves the aircraft path.
237 inline string GetAircraftPath(void) {return AircraftPath;}
238 /// Retrieves the control path.
239 inline string GetControlPath(void) {return ControlPath;}
241 string GetModelName(void) { return modelName; }
243 FGPropertyManager* GetPropertyManager(void);
244 vector <string> EnumerateFDMs(void);
245 void SetSlave(void) {IsSlave = true;}
255 static unsigned int FDMctr;
259 static FGPropertyManager *master;
260 FGPropertyManager *instance;
266 double roll, pitch, yaw;
272 roll = pitch = yaw = 0.0;
288 FGAtmosphere* Atmosphere;
290 FGPropulsion* Propulsion;
291 FGMassBalance* MassBalance;
292 FGAerodynamics* Aerodynamics;
293 FGInertial* Inertial;
294 FGGroundReactions* GroundReactions;
295 FGAircraft* Aircraft;
296 FGTranslation* Translation;
297 FGRotation* Rotation;
298 FGPosition* Position;
299 FGAuxiliary* Auxiliary;
302 FGInitialCondition* IC;
305 vector <slaveData*> SlaveFDMList;
307 bool ReadMetrics(FGConfigFile*);
308 bool ReadSlave(FGConfigFile*);
309 bool ReadPropulsion(FGConfigFile*);
310 bool ReadFlightControls(FGConfigFile*);
311 bool ReadAerodynamics(FGConfigFile*);
312 bool ReadUndercarriage(FGConfigFile*);
313 bool ReadPrologue(FGConfigFile*);
314 bool ReadOutput(FGConfigFile*);
317 bool DeAllocate(void);
318 void Debug(int from);
321 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%